with reference to WARNING:
Duplicate C declaration, also defined at driver-api/usb/gadget:804
There is a function usb_string in the file message.c,
there is also a struct usb_string in the kernel api headers.
The docs is unable to index the function as the index is occupied by struct
This fix adds messgae.c to the usb_core namespace (in docs) hence providing
usb_sting a unique index usb_core.usb_string()

Signed-off-by: Kevin Paul Reddy Janagari <kevinpaul468@gmail.com>
---
 Documentation/driver-api/usb/usb.rst | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Documentation/driver-api/usb/usb.rst b/Documentation/driver-api/usb/usb.rst
index 89f9c37bb979..976fb4221062 100644
--- a/Documentation/driver-api/usb/usb.rst
+++ b/Documentation/driver-api/usb/usb.rst
@@ -161,6 +161,7 @@ rely on 64bit DMA to eliminate another kind of bounce buffer.
 .. kernel-doc:: drivers/usb/core/urb.c
    :export:
 
+.. c:namespace:: usb_core
 .. kernel-doc:: drivers/usb/core/message.c
    :export:
 
-- 
2.39.5

Hi,

Kevin Paul Reddy Janagari wrote:
> with reference to WARNING:
> Duplicate C declaration, also defined at driver-api/usb/gadget:804
> There is a function usb_string in the file message.c,
> there is also a struct usb_string in the kernel api headers.
> The docs is unable to index the function as the index is occupied by struct
> This fix adds messgae.c to the usb_core namespace (in docs) hence providing
> usb_sting a unique index usb_core.usb_string()

This is a bug of Sphinx.
Quote of my message in July 2023 [1]:

 > This is a bug of Sphinx >=3.1, first reported by Mauro back in September 2020 at:
 >
 >     https://github.com/sphinx-doc/sphinx/issues/8241
 >
 > It was closed when a local fix was presented.  Unfortunately, it was not
 > merged at the time and a subsequent pull request was opened at:
 >
 >     https://github.com/sphinx-doc/sphinx/pull/8313
 >
 > It is not merged yet and carries a milestone of Sphinx 7.x.

[1]: https://lore.kernel.org/0475d177-4c01-0988-0b34-3099dd703498@gmail.com/

The PR carries a milestone of Sphinx 8.x now ...

It might be a high time to make some noise in the PR.

       Thanks, Akira

> 
> Signed-off-by: Kevin Paul Reddy Janagari <kevinpaul468@gmail.com>
> ---
>  Documentation/driver-api/usb/usb.rst | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/Documentation/driver-api/usb/usb.rst b/Documentation/driver-api/usb/usb.rst
> index 89f9c37bb979..976fb4221062 100644
> --- a/Documentation/driver-api/usb/usb.rst
> +++ b/Documentation/driver-api/usb/usb.rst
> @@ -161,6 +161,7 @@ rely on 64bit DMA to eliminate another kind of bounce buffer.
>  .. kernel-doc:: drivers/usb/core/urb.c
>     :export:
>  
> +.. c:namespace:: usb_core
>  .. kernel-doc:: drivers/usb/core/message.c
>     :export:
>  
> -- 
> 2.39.5